Square flange graphite bearing

1 in stock

  • Allows maintenance-free and long-life operation;
  • Suitable for high static and dynamic loads;
  • With low and smoothly coefficient of friction and without stick-slip effects;
  • Suitable for dirty, corrosion, impact load and edge loading;
  • The base material provided a good shock-absorbing capacity;
  • Can be used over a large temperature range;
  • Suitable for reciprocating, rotating and oscillating movement with start frequency
    and difficulty to form oil film occasions;
  • With low wear rate and long life service.


Viiplus square flange graphite bearing consists of highly wear-resistance copper cast alloy whose sliding surfaces are evenly provided with a certain percentage of solid lubricant plugs according to work condition, high-strength copper alloy provides a high load-bearing capacity, and the solid lubricant can be the formation of low friction film. When it comes to high loads and small motions where lubrication is difficult to implement, these bearings are excellent solutions. The graphite plugs cover about 25-30% of the bearing surface and is positioned so that the entire bearing surface is always lubricated.

Under technical dry running conditions, the bearing surface is designed with a thick running-in film which enables the solid lubricant to be transferred to the counter material at the first contact.

Types of Graphite Bearings

There are various types of graphite bearings available, each with specific features and applications.

Plain Graphite Bearings

Plain graphite bearings are the most basic type of graphite bearing, with no specific flange or mounting features. These bearings are designed for simple applications where the bearing is press-fit into a housing.

Flange Graphite Bearings

Flange graphite bearings have a flange on one end, providing a mounting surface for applications where axial positioning is required. This design allows the bearing to be easily mounted to a housing or plate.

Square Flange Graphite Bearings

Square flange graphite bearings combine the benefits of graphite bearings with a square flange design, offering improved mounting stability and increased load distribution. These bearings are ideal for applications requiring high load capacity and precise alignment.


mm d(F7)mm D(h7)L mmHTtdid2P.C. DWFAHex Bolts
6+0022 +001010+0 -001515 202542.23.56172017M3- 10×2* ⑷
8+0028 +0.01312+0 -001815 20 25 30 352742.23.56192219
101415 20 25 302942.23.56212321
12+0034 +00161820 25 30 35 4036534.57.5262826M4-12×2 气4)
1319+0 +002120 25 30 3537534.57.5272927
162215 20 25 30 35 40 5040534.57.53031182412*4
20+0.041 +0.0202815 20 25 30 35 40 50 60 704963.75.5938382231M5-16×4
2533+0 -002520 25 30 35 40 50 60 70 805463.75.5943422535
303835 40 50 60 706384.26.61150503040M6- 20×4
35+0.050 +00254440 50 60 70 806984.26.61156543643
405035 40 50 60 70 80 10082105.291466643854M8- 25×4
5062+0 -0 03070 80 10094105.291478735060

Square Flange Graphite Bearing Features:

– It is suitable for vertical movement, reduces the fixed production, the assembly time.
– No oil lubrication, wear resistance, high bearing, high precision, long service life.


The finished copper alloy bushing provides a simple and economical bearing application, featuring high bearing capacity, good corrosion resistance, and arbitrariness of dimension processing. At the same time, different brands of copper alloy can be provided according to different service conditions, and different forms can be processed according to projection requirements. It has higher dimensional accuracy than rolled copper bearings.

Applications of Square Flange Graphite Bearings

Square flange graphite bearings are used in various industries, including:

Automotive Industry

In the automotive industry, square flange graphite bearings are commonly used in transmission systems, suspension components, and engine components. Their high load capacity, low friction, and self-lubricating properties make them an ideal choice for demanding automotive applications.

Aerospace Industry

The aerospace industry often requires components to operate under extreme conditions, such as high temperatures and corrosive environments. Square flange graphite bearings are an excellent choice for aerospace applications due to their ability to perform well in these harsh conditions.

Manufacturing Industry

Square flange graphite bearings are used in various manufacturing applications, such as assembly lines, conveyors, and robotic systems. Their durability, low maintenance requirements, and high load capacity make them ideal for use in demanding manufacturing environments.

Oil-free flange bearing lifespan calculation

The life of oilless bushings depends on the amount of wear. The calculation of wear amount is very different due to surface pressure, sliding speed, movement pattern, lubrication conditions, the surface roughness of matching shaft, and other conditions.From the viewpoint that the wear amount is proportional to the load and sliding distance, the following formula is usually used to calculate the wear amount. Please consider it as the standard for selection.

Estimate wear(mm)W=K*1×p×v×T

Wear ratio(k):mm/(N/mm2·m/s·Hr)

Design surface pressure(p):N/mm2

Sliding speed(v):m/s

Friction time(T):Hr-hr

Material Compostion and Properties






oilless bearingoilless bearingoilless bearingoilless bearing








Hardness HB>210>250>150>70>80>190HRC>58
N/mm2 Tensile strength>750>800>800>200>260>250>1500
Coefficien of linear expansion 10″
Limit Temp °C-40-+300-40-+150-40-+400-40-+400-40-+400-40 〜+400_40〜+400
Max.load N/mm?100120150607080200
m/min Max.speed (Dry)151520101085
Max.PV PV N/mm2*m/min20020060608040150
Compression Set 300N/mm2<0.01< 0.005<0.04<0.05<0.05<0.015< 0.002



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